I was watching Mudrer by Decree yesterday with a friend. I live in Devon now but lived in London until I was 18. My friend has lived in Devon since birth.
Mudrer by Decree was released in 1979. There's a website page which shows where it was filmed.http://www.british-film-locations.co...By-Decree-1979

The "Holmes searches for Mary" (see above linked page) location was Southwark. As I was watching the film I was reminded that in 1979 I was in my early teens and my grandfather and me would go to Petticoat Lane every Sunday and if there was time we'd explore a bit. We lived in West London (Acton). Some of the areas we'd explore, as well as parts of West London, looked just like the Southwark location from the film. For some areas it looked like there had been no development since before the war.
I had been introduced to JTR via Stephen King's book 2 or 3 years prior. As a lot of those buildings were from Victorian and Edwardian era it wasn't too hard to imagine what it was like at the time of JTR. This was also before the outsides of buildings were cleaned, bar the windows.
I think of all the Ripper films, in some shots Mudrer by Decree best captures how I imagine the area looked at night from all the literature I've read on the subject. As in the image below. No idea where the image scene was actually filmed. Could be some studio backlot!